416 



PBAGTIGAL GUIDE TO GABDEN PLANTS saxifbaga 



S. adscendens S. tridactylites 



S. petma 



3. Nephrophylkim. — Stems slender, 

 animal or biennial, rarely perennial, 

 usually solitary, erect, leafy. Badical 

 leaves stalked, kidney-shaped, lobed. 

 Flowers few, often large, white. Petals 

 obovate, wedge-shaped, or narrowed into 

 a claw. Calyx tube short, sepals united 

 at the base. 



S. atlantica 

 S. biterndta 

 S. Boissieri 

 S. granulata 



S. irrigua 



S. lactea 



8. latepetiolata 



4. PeUiphyllum. — This section con- 

 tains only one species — 8. peltata — 

 described below. 



5. Miacopetalum. — Stems leafy, sto- 

 lons none. Leaves alternate, roundish 

 and thickish, rnore or less sHghtly lobed 

 or crenate. Plowers in panicles, white, 

 spotted, with oblong petals. Calyx seg- 

 ments almost free. Ovary free. The 

 only species belonging to this section is 

 8. rotuncUfolia. 



6. Hirculus. — Stems leafy. Leaves 

 various, entire, with curved nerves, and 

 narrowed into a hairy petiole. Flowers 

 yellow, with oblong or rarely obovate 

 petals. Sepals free, erect, or spreading, 

 or reflexed. 



There are several species belonging to 

 this section, but only two, S. diversifoUa 

 and S. Hirculus, are described below. 



7. Boraphila. — Stem almost absent. 

 Eadical leaves stalked. Scape paniculate. 

 Calyx tube conical, adhering to the base 

 of ovary. Petals white, yellowish-green, 

 or purplish, broadly or narrowly elliptic 

 or lance-shaped, rarely obovate. 



8. Clusi S. nivalis 



S. hieracifoUa S. pallida 



8. integrifolia 8. pennsylvanica 



8. leucanthemifolia 8. virgimiensis 



8. mertensiana 



8. Hydatica. — Stems erect, scape-like. 

 Leaves leathery, rarely flaccid, roundish 

 or wedge-shaped, in rosettes on the sterile 

 stems. Calyx lobes and ovary nearly 

 free. Petals white, sometimes unequal, 

 3 being smaller than the other two. 



8. cortuscsfolia 

 8. cuscutczformis 



8. Fortunei 

 8. sarmentosa 



9. Dactyloides. — Stems usually de- 

 cumbent, spreading or compact. Leaves 

 persistent, often 3-5-cleft, or pedately or 

 palmately cut. Flower stems often leafy. 



Flowers solitary or corymbose, white or 

 straw-yellow. Calyx tube rather long. 



8. ajugcBfolia 

 S. OMdrosacea 

 8. aphylla 

 8. aqiiatica 

 8. Gamposi 

 8. conifera 

 S. cuneata 

 8. exarata 



S. geramoides 

 8. globuUfera 

 8. hypnoides 

 8. mixta 

 S. muscoides 

 8. pentadactylis 

 8. trifurcata 



10. Trachyphylhim. — Leaves fleshy 

 or leathery, stiff, entire, beset with spiny 

 or bristly hairs. Flowers in cymose 

 racemes or panicles. Petals oblong or 

 more or less roundish obovate, sometimes 

 absent. 



8. aizoides 



8. aspera 



8. bronchialis 



8. flagellaris 

 8. tenella 



11. Sobertsonia. — Stems perennial, 

 woody, with a rosette of leaves at the 

 apex. Leaves roundish or obovate, cre- 

 nate or serrate, with slightly cartilaginous 

 margins, heart-shaped or wedge-shaped 

 at the base, and ending in a flat or half- 

 round stalk. Flowers in panicles, white, 

 spotted with yellow or purple ; petals more 

 or less obovate oblong. 



S. cuneifolia S. umbrosa 



8. Oeum 



12. Aizoonia. — More or less erect, 

 often tufted herbs. Leaves in rosettes, 

 perennial, very leathery, with cartilagi- 

 nous margins, pitted, often porous at the 

 apex. Flowers in panicles or corymbs, 

 white, sometimes spotted with purple; 

 or yellow, rarely red. Petals obovate or 

 wedge-shaped, rarely lanoe-shaped. 



8. Aizoon 8. Hosti 



8. Cotyledon 8. lingulata 



S. cnistata 8. longifolia 



8. florulenta 8. rmdata 



13. Kahschia. — Stems perennial, 

 clothed with densely imbricating leaves. 

 Lower leaves thickish or fleshy, tongue- 

 shaped or obovate spoon-shaped, pitted at 

 the margin. Flowers in cymose racemes 

 or panicles, white or sometimes yellow, 

 rarely purple. Petals more or less roimd- 

 ish or wedge-shaped. 



8. apiculata 8. Kotschyi 



S. aretioidcs S. luteo-viridis 



8. burseriana S.'marginata 



8. ccBsia S. media 



8. diapensioides 8. pseudo-sancta 



8. imbricata 8. rocheliana 



8. juniperifolia 8. sancta 



